The victory only strengthened the case for Bradley to bring his clubs to Bethpage Black for the September matches against Europe. He moved to No.9 in the standings.

And he wound up beating Tommy Fleetwood, who scored the clinching point for Europe at Marco Simone two years ago.

One shot behind Fleetwood going to the 18th hole, Bradley stuffed his approach to just under six feet below the hole. Fleetwood, looking like this might be the time he wins a PGA Tour title, came up some 50 feet short and took three putts for bogey and a 72.

Bradley kept his feet planted when the putt dropped and shook his fist. New England's favourite son delivered a stunner at the TPC River Highlands, capping off the finish in oppressive heat with a 35-foot birdie putt on the 15th and the six-footer at the end.

"Of all the shots and all the putts I hit, I think I'm going to remember that one the most," he said of his final birdie.

It was crushing for Fleetwood, the 34-year-old from England who has built a reputable record around the world but is winless in 84 regular PGA Tour events.

"Still feel like from where I was, I should at least be in a play-off," he said.

"So, yeah, it's a crappy way to finish."

Russell Henley (69) chipped in from across the 18th green for birdie and joined Fleetwood one shot behind.

Harris English (65) boosted his Ryder Cup hopes by tying for fourth with Australia's Jason Day (68), two adrift of Bradley.

Day started with a birdie on the 1st and then two more on 11 and 14, but his title challenge fizzled out across the final four holes, bogeying the par-4 17th to go one over on the run home.

Bradley has two wins against world-class fields in the last 10 months, finishing at 15-under 265 and claiming $US3.6 million ($A5.5 million) for his first title in a signature event. He also won the BMW Championship, the second FedEx Cup playoff event, last August at Cherry Hills outside Denver.

"I felt like I was just too far behind the whole day," Bradley said.

"I was just chasing, chasing ... It was insane, the crowd and the atmosphere and the scene there."

The 39-year-old won on the one-year anniversary that he received the call asking him to be Ryder Cup captain.

Scottie Scheffler (65), who had a share of the 36-hole lead until a 72 in the third round, tied for sixth with Rory McIlroy (65), three shots back.

Scheffler and McIlroy already have clinched spots on the Ryder Cup team. Bradley is assured of being there, too. Still to be determined his what role he plays.

With AAP & Reuters.